Remain negatively buoyant throughout the dive, requiring solid anchoring at the waist rail.
Cylinders must lie parallel to the body, tucked under the armpits, rather than dangling or splaying outward [1].
The central spine strap must be adjusted so that the shoulder plates sit flat against your shoulder blades and the buttplate or waist rail rests precisely on your hips. If the harness is too long, the cylinders will sag, dragging your legs down and ruining your trim. If it is too short, the tanks will ride up into your armpits, severely restricting your head movement and valve access. Bungee Systems: Continuous vs. Loop sidemount principles for success verified
SPGs should be mounted on short, 6-inch hoses, routed downward along the cylinder body, and clipped off to the facing D-rings. This allows you to check your gas pressures with a simple downward glance, keeping the gauges protected from impact and preventing them from dangling below your profile. 4. Gas Management and Situational Awareness
Should be tight enough to hold the wing and top attachments secure, but loose enough to allow full rotational mobility of the arms. If the harness is too long, the cylinders
Backmount systems place the weight of the cylinders high on the back, pushing the diver forward. Sidemount places the mass lower and closer to the body’s center of gravity. This makes it easier to maintain a flat, horizontal position, but it also means improper weight placement will instantly ruin your trim. Weight Distribution
Leo began to focus on the Four Foundations : Loop SPGs should be mounted on short, 6-inch
Divers must balance the pressure between both cylinders throughout the dive. This ensures that if one regulator or cylinder fails, you still have an equal and sufficient amount of gas in the remaining cylinder to safely exit or ascend. Switching Protocols